FIELD: chemistry.
SUBSTANCE: invention relates to stabilized solutions of polyvalent anionic polymerization initiators, and methods for continuous production of polydienes or polydiene copolymers. The stabilized anionic polymerization initiator solution composition contains: i. extended chain initiator defined by the formula 
wherein SOL is a bivalent solubilizing component, x is an integer of 1 or more, Q represents (a) a member selected from the group consisting of O, S, N, P and Si, or (b) a multivalent organic group, and R1, R2, R3 and R4 independently represent a monovalent organic group or R1 is connected to R2 to form a trivalent organic group and/or R3 is connected to R4 to form a trivalent organic group, or an extended chain initiator defined by formula
wherein each SOL independently represents a divalent solubilising component, x is an integer of 1 or more and R14, R15 and R16 each independently represent a divalent organic group; and ii. aliphatic solvent, cycloaliphatic solvent or a mixture of these solvents. A method for continuous production of polydienes or polydiene copolymers include: i continuous supply of a conjugated diene monomer into the reactor, optionally together with a monomer copolymerizable with the said diene monomer; and ii. continuous supply of a stabilized solution of the elongated chain initiator into the reactor.
EFFECT: obtaining of multivalent lithiated initiators, stable in aliphatic or cycloaliphatic solvents and remaining stable during polymerization, including continuous polymerization and polymerization conducted at elevated temperatures.
20 cl, 5 tbl, 6 ex
